Vortex shedding

This vibration is the cause for overhead power line wires humming in the wind,[1] and for the fluttering of automobile whip radio antennas at some speeds.

[2] A thrill ride, "VertiGo" at Cedar Point in Sandusky, Ohio suffered vortex shedding during the winter of 2001, causing one of the three towers to collapse.

[3] In northeastern Iran, the Hashemi-Nejad natural gas refinery's flare stacks suffered vortex shedding seven times from 1975 to 2003.

Some simulation and analyses were done, which revealed that the main cause was the interaction of the pilot flame and flare stack.

[7] The effectiveness of helical strakes for reducing vortex induced vibration was discovered in 1957 by Christopher Scruton and D. E. J. Walshe at the National Physics Laboratory in Great Britain.

For maximum effectiveness in suppression of vortices caused by air flow, each fin or strake should have a height of about 10 percent of the cylinder diameter.

A Stockbridge damper is used to mitigate aeolian vibrations caused by vortex shedding on overhead power lines.

Vortex shedding behind a circular cylinder. In this animation, the flows on the two sides of the cylinder are shown in different colors, to show that the vortices from the two sides alternate. Courtesy, Cesareo de La Rosa Siqueira.
Vortex shedding as winds pass Heard Island ( bottom left ) in the southern Indian Ocean resulted in this Kármán vortex street in the clouds
A helical strake on a chimney stack
image of Tuned Mass Damper on top of a chimney
Tuned mass damper on top of a chimney